Huawei E5331 - Charge Failure

E5331 Maintenance Manual Basic Version V1.0
Internal
2012-4-21
Huawei confidential. No spreading without permission.
Page 36 of 57
9.3 Charge Failure
Reference Figure 9-3
Charge Failure
Measure if the voltage
of VBAT is 3.4-4.2V?
Replace the
U3801
Replace the U3101
Insert charger
Y
N
Measure if the voltage
of VBUS is 5V?
Y
Replace the
J3701
N
J3801
U3101
J3701
J3702
U3801
Figure 9-3